Stopping device for silk-doubling machines.



P. SARACCO. STOPPING DEVICE FOR SILK DOUBLING MACHINES.

APPLICATION FILED SBPT.1,1909

976,499. Patentea'Nov.22,1910.

erica.

PIETRO SARACGO, OF SALUZZO, ITALY.

STOPPING DEVICE FOR SILK-DOUBLING MACHNES.

To all 'whom 'it may concern:

Be it known that I, PIETRO SARACCO, a subject of the King of Italy,residing at Saluzzo, in italy, have invented a certain new and usefulStopping Device for Silk- Doubling Machines, of which the following is aspecification.

This invention relates to a thread breaking device applicable to a typeof apparatus for preparing throwing silk that is exemplified in thepatent application Ser. No. 478,810 and it has for its object to providefor the breaking of one of the two threads when the other hasaccidentally been broken.

The arrangement according to this invention has been devised for thetype of apparatus referred to, for as the axes of the bobbins turnaround an intermediary axis, the systems ordinarily adopted for breakinga thread when the other is broken would not be applicable.

On the annexed drawing is shown diagrammatically one form of carryingout the invention, by way of example.

Figure 1 is a side view of a small apparatus according to thespecification above referred to, provided with the device according tothis invention; Fig. 2 is a rear view of the device itself.

As seen in Fig. 1, the device consists of a lever pivoted to a support 1and having three arms 2, 3, and 4, the first of which carries a weight 5capable of adjustment on the said arm 2. The arm 3 carries a support G,of porcelain, or other suitable material, while the arm 4 normally restswith its hooked end aga-inst a rod 7 pivoted at 8 on the support 1 andprovided, if necessary, with small teeth on its surface. rllhis rod 7has a stop 9 which, abutting againsta corresponding projection on thesupport 1, prevents the rod 7 from descending below the position shownin dotted lines. The said rod has in addition a notch 10 in which theend of the arm 4 can engage so as to retain.r it in a certain position.On the 'support 1 is also mounted the small wheel or pulley 12 as wellas the hook 13 for guiding the thread.

The device is mounted on the apparatus in such a manner that the thread,doubled and twisted, enters the hook 13, passes over the support 6 andthe wheel 12 in order to be wound on the bobbin 14. By adjusting theposition of the weight 5 on the arm 2, the tension of the thread may beso regnlated as to maintain the support 6, and con- Speccation ofLetters Patent.

Application filed September 1, 1909.

Patented Nov. 22, 1910.

serial No. 515,709.

sequently the three-armed lever, in the position shown in full lines inFig. 1.

During the normal working of the apparatus the casing 15 of which,pivoted on the support 16, revolves, driven by a belt on the pulley 17,the doubled and twisted thread as it winds on the bobbin 14 has atension equal to twice that of thread coming from the two revolvingbobbins 11 and traversing the device 18 for keeping the elementarythreads stretched so that the support 6 bearing on the thread itself cansustain the weight 5 suitably adjusted on the arm 2. When, however, oneof the elementary threads break, the tension of the doubled and twistedthread is reduced by one half and it can no longer sustain the support 6which under the action of the weight 5 assumes the position shown indotted lines in Fig. 1. Then the arm 4 of the lever leaves the rod 7,which by its own weight falls into the position shown in dotted lines.The casing 15 and consequently the axes of the bobbins 11 continuing torevolve, the thread which is not broken will now be broken on strikingthe rod 7.

From what has been said, it will be understood that the device formingthe subject of the prese-nt application serves to break a thread comingfrom the bobbins 11 when the other thread is broken.

Vhat I claim as my invention and desire to secure by Letters Patentis 1. A stopping device for silk doubling machines, comprising incombination, unwinding bobbins, a revolving mounting for said bobbinshaving an axis out of alinement with the axes of said bobbins, a Windingbobbin for receiving the doubled thread composed of the single threadsof said bobbins, a thread breaking device arranged to fall by gravityinto the path of the single threads, and means engaging and controlledby the tension of the threads for holding said breaking device in aninoperative position when the single threads are intact and serving uponbreakage of one of said threads to release said device, substantially asand for the purpose set forth.

2. A stopping device for silk doubling machines comprising incombination, unwinding bobbins, a revolving mounting for said bobbinshaving an axis located between the axes and said bobbins, a windingbobbin for receiving the doubled threads composed l of the singlethreads of said bobbins, a pivotally mounted gravity. acting threadbreaking device arranged to fall into the path of tihe single threads,and a pivoted device engaging and controlled by the tension of saidthreads for holding said device in an inoperative position when thesingle threads are intact and serving upon breakage of one of saidsingle threads to release said device, substantially as and for thepurpose set forth.

3L A. stopping device for silk doubling machines comprising incombination, two unwinding bobbins, a revolving mounting for saidbobbins having its axis of rotation disposed between the axes of saidunwinding i' bobbins, a winding bobbin for receiving the doubled threadscomposed of the single PIETRO SARACCO.

Witnesses SCEENDO CORTA, INGLARTO CORTA.

